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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW_N20(WNn020) Geologic Unit Monitored Dakota Coal <br /> Elevation Ground Level (ft-amsl ) 5739.746 <br /> Location: N 600391.845 E 1,119304.80 T 46 N R 15 W S 6 B A A <br /> Total Drill Depth (ft) 76.5 <br /> Total Well Depth (ft) 76.5 <br /> Drilling Details <br /> Borehole Diameter (in) 7 7/8 Rig Soeedstar 1500 <br /> Bits Tricone Driller Allan Chiles <br /> Drilling Fluid Air and Mud <br /> Additional Details <br /> Drilling/Construction: Start 07/08/86 Finish 07/09/86 <br /> Lithologic Log (Y/N) N <br /> Geophysical Log (Y/N) N <br /> Construction Details <br /> Casing Specs : Blank 4"id PVC sch40 Perforated 0.05" slot <br /> Perforated Interval (s) 58.6' - 76.5' <br /> Packer and Cement Basket Set At 76.5' <br /> Cement From 33.0' To 58.6' <br /> Bentonite Slurry From 5.0' To 38.0' <br /> Gravel Pack From NA To <br /> Additional Details <br /> Development Sunnnary Air/water and air injection for 2 hours, cleaned up and pro- <br /> duced-2 gpm. <br /> Comments, Problems <br /> D-17 Revised 11/01/86 . <br />